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2009 Confidence Interval Detail
221/Taylor
221-912/Wylie ISD

Category Summary

(1)
Category
(1)
Local
Value
(1)
Stratum
Ratio
(1)
State
Value
(2)
Sample
Size
(3)
Total
Parcels

Stratum
Variance
A 187,992,907 0.9738 193,050,839 54 1,736 .002910241
A 196,970,680 0.9769 201,628,294 57 1,238 .002729890
A 209,323,991 0.9910 211,225,016 56 1,008 .002668738
A 204,484,166 0.9816 208,317,203 47 596 .008563601
D3 145,830,553 0.8270 176,336,823 13 2,789 .057302101
F1 20,639,168 0.9738 21,194,463 6 66 .001994624
F1 20,756,072 0.9241 22,460,851 5 19 .068841779
F1 19,784,146 1.0396 19,030,537 3 6 .013558983
L1 13,605,538 1.0028 13,567,549 6 83 .002280968
L1 15,851,410 1.0317 15,364,360 7 19 .002404412
L1 22,615,982 0.9197 24,590,608 4 5 .001079888
Random Totals: 1,057,854,613   1,106,766,543 258 7,565  
Catg D1 Exception Values: 5,745,626   5,588,690      
Catg F1 Exception Values: 63,580,908   66,401,324      
Catg L1 Exception Values: 50,189,993   53,889,024      
Total Test Values (4): 1,177,371,140   1,232,645,581      

Margin of Error

Margin of Error Percent: 5.0000000
Margin of Error Value: 61,632,279

Confidence Interval Values (5)

State Lower Limit: 1,171,013,302 (State Test Value minus Margin of Error Percent)
Local Test Value: 1,177,371,140 (Within Confidence Interval)
State Upper Limit: 1,294,277,860 (State Test Value plus Margin of Error Percent)
Value Assigned (6): 1,219,304,939 (See ISD Summary Worksheet)

Sources:
(1) See Stratified Category Worksheet Reports PTS236, PTS430
(2) Number of parcels sampled by staff
(3) Total Category Parcels from Stratification Report, Appraisal Roll, or Self-report
(4) Includes any parcels in A, B, C, D3, F1, G1, G2, or L1 marked as exception properties
(5) Unstudied categories and sub-categories were not included in the Confidence Interval Values
(6) Includes local value of unstudied property categories and sub-categories

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